Alarm



Oct. 28 1924.

. 1,5135229 H. F. DEMMER ALARM Filed Feb. 28'. 1923 ffi'emmer Paentedocgzs, 1924.

UNITED STATES HENRY FERDINA'ND DEME/LER, GF BALLINGER, TEXAS.

ALARM.

Application filed February 28, 1923.

To all vwho/'a 'it mog/ camera Be it known that I, HENRY F. Dnrininn, aCitizen of the United States, residing Ballinger, in the county ofRunncls and State of Texas? hare invented certain new and usefullmprovcments in ..-l.larms, of which the following is a specifioation.

This inrention relates to automaticall.V sounding alarms and itsprimaryv object to provide a simple and efiicient mechaism whereby, whenthe door of a garage or lil-:el structure isopened, an alarm will l isne sounded and notice thereh'y given so that7 if the opening isunauthorized, the intrusion will be at once detected. The invention isintended primarl)7 for use to prevent theft of automobiles and is soa-rranged that? when the door of a garage is opened.l the horn of theautomobile will he sounded. The invention includes means for holding thealarm inoperative while the door of the z'arage is open and the.ffjarage is occupled by the owner of the Vehiele or other authorizedpersons, the said means being so arranged as to be released when t iedoor is closed and the alarm thereby "or operation. The stated objectsof the invention, and other objects which will her inafter incidentallyappear, are attained in such 1:.

device as is illnstrated in the aceompanyng drawing. and the inventionresides in certain novel features which will he particulfcrlj,Y pointedout` in the appended claims.

In the drawing:

Figure 1 is a view, partly in plan and partly in horizontal Section,showing my improved alarm as arranged in a garage, and

Fig. 2 is an enlarged perspective viewof the operating parts of thealarm showing them as they are arranged when the garage is to he'occupied without the alarm sounding.

In the drawing, the reference numeral l indicates portion of a garageand 2 a pertion of ztn-automobile therein equipped with a horn 3 whichmav be of any well-known or preferred type operated from the battery ormagneto of the car. In carrying out my 11 vention,V l provide within thegarage a bracket or supporting plate 4 which may he secured in anyconvenient manner at a point in or adjacent the horizontal plane of theupper end of the door 5. Extendinn' through and rigidly secured in thesaid suppo 1ting plate are terminals 6, to which are attachedconducto-rs 7 and 8 (see Fig. 2) which are to be connected with theyhornand battery lustrated as co..

serial. No. 621,822.

of the automobile so that if a circuit be closed through the terminal (5the horn will be sounded just as though in use upon the road. One of theterminals (3 eonstitutes the "fulcrnm or pivot for a circuit-closinnYlevel' 9 which extends to both sides of said terminal. and has a spring10 attached thereto near one end7 the opposite end of the Spring beingsecured in a convenient manner to the supporting plate 21-, as will bemost readil'yv understood upon reference to Fig. 2. The lever 9 may beof ai conve ient form and is iltructed from a single strand of stoutwire having its ends brought together, as shown at ll, and having eyes ladanted to eno' oartlv nh ol? the cireuit-clo Ang leve' fie bi her. V

V i. secured rigidly to the door near the efloe thereof and near theupper end su ne in position to imp a`4 inst the end of the'ircnit-closing lever when the doorY is Closed. i

lVhen it is desired to perform any work within the Garage or for otherreason the garage is to ne occupied or the door left open and it isdesired to prevent sounding of the alarm, the latch 13 is swung intoposition to engage the wider operating' or handle end of the level` 9,as shown in Fig. 2-, and the length of the latch is such that,V when itso engages the lever., the spring-attached end thereof will be held outof contact with the adjacent terminal 6 against the tension of thesprino' 10 so that the Circuit through the lever will be broken, theSpring acting upon the lever with suf'icient force to hold it inengagement with the latch so that the latch will be gripped1 and betweenthe lever and the loop 15 and the contact end of the lever will bemaintained out of engagement with the terminal, as will be readilyunderstood. It will be noted that the bracket 14: has one end turneddownwardly, as shown at 17, whereby it may be rigidly secured to thedoor and the opposite end of the bracket is turned upwardly, as shown at18, to provide an former at intermediate portions of its length d is'owner 'or occupants of the adjacentdwelliabutment or lever-striking lipwhich will project into the pathof the levei` 9. rl`he bracket orswitch-throwing arm 14 is so arranged and of such length that, when thedoor is fully closed, the bracket will pass beside the latch and the lipor Striker 18 will project beyond the end of the latch 13 and willimpinge against the lever and swing the.

same slightly about its pivot, whereupon the latch will be released andwill drop into the position shown in dotted lines in Fig. 2, the Spring10 being put under greater tension and the contact. end of the leverbeing moved a slightly greater distance from the adjacent terminal 6. Ifthe door be then Vopened, the bracket will be withdrawn whereupon spring10 will contract and at once draw the contact end of thelever againstthe adjacent terminal 6 'so that the circuit ill be closed Vand the hornof the automobile sounded, the horn continuing to sound until thecircuit is again broken. Obvously, if the opening of the garage by someunauthorzed person, the

ing-will at once become aware of the intrusion and may take such actionas will vresult in the arrest of the intruder and prevention of thethreatened theft of the automobile. The attachment of the conductors 7and 8 with the horn and the body of the automobile are,V of course,detachable sothat, when the 'automobile'is to be used,

they may be readily separated from the carl' v If so desired, the devicemay be connected with a bell 22 and a switch 23 in the dwelling Vso thatin the night time if the switch 23 be 'closed and the door of the garageshould then be opened, the alarm will be sounded in the dwelling and theoccupants notified of the conditions. i

My device is exoeedingly simple in the construction and arrangement 'ofits parts,

it may be very readily applied to any ga-rage i at a very slightexpense, andl will prove highly efiicient in use for the purposes forwhich it is designed. V

Having' thus descibed the invention, what is claimed as new is:

1. In an alarm, the combination of fixedV electric terminals, a switchlever fiilci'umed upon one of the terminals and extending past the othertermmal,V yieldable means connected with the lever and vtendingconstantly to effect' contact between the lever and sad othertermnal,means adaptedto 'directly-engage the switch lever and hold it out kofcontact with said other terminal in'opposition to said yieldable means'9and means carried'by a moving'part to directly engage 'the lever andrelease itfrom said holding means and maintain the lever out of contactwith saidV terminal. V

2.' n a device for the purpose set forth, the combination ofspacedelectric terminals,

a switch lever fulcrumed upon-one of saidl terminals and adapted to formcontact with the other terminal, a sprng actng upon the contact endofthe switch lever to move 'it into engagement with the adjacentterjacent terminal, the withdrawal of the vbracket permtting the leverto make 'con-- tact with the terminal.

In testimony whereof I affx my signa-' ture.

HENRY FERDINAND DEMMER. [L.S.]

